[1] Univ Calif Irvine, Dept Surg, Orange, CA USA
[2] Emory Univ, Dept Surg, Atlanta, GA USA
[3] Amer Board Surg, Philadelphia, PA USA
[4] H Lee Moffitt Canc Ctr & Res Inst, Dept Gastrointestinal Oncol, Tampa, FL USA
[5] Univ Massachusetts, UMass Mem Med Ctr, Dept Surg, Chan Med Sch, Worcester, MA 01605 USA